What battery charger for winter storage?

Shcumacher battery tender brand.

I got two of the cheap ones at a swap meet for $10 each. I wire tied them to the rafters above the battery locations for the two cars I store in my garage. I don't use them all the time but they're nice to have there if I'm working on a charging or cranking issue.

I also picked up the next model up for $13, which is a 10/6/trickle IIRC. I have that at my shop. Careful with the harbor freight ones. For one thing, the LED lights no matter which terminals are connected!?

OK, it's this one-